Furnace.



No. 807,976. PATBNTBD DBG. 19, 1905. G. THOMAS.

FURNACB.

APPLICATION FILED MAY 17. 1904 2 SHEETS-SHEET 1Y T3 E u MII www Ofi l/ INo. 807,976. PATENTED DEC. 19, 1905.

G. THOMAS.

PURNAGB.

APPLICATION FILED MAY 17, 1904.

2 sHmTs-sHBBT 2.

uuowwsy( Nrrnn STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application inea May 17,1904. Senn No. 208,438.

T0 a/ZZ whom t www concern:

Be it known that I, GEORGE THOMAS, a citizen of the United States,residing at Royersford, in the county of Montgomery and State ofPennsylvania, have invented new and useful Improvements in Furnaces, ofwhich the following is a specification.

My invention relates to improvements in furnaces.

Said invention has for its object to promote combustion by the aid ofsuperheated steam or air, or both, the same producing a uniform andsteady supply of oxygen over the fire-bed or products of combustion,thus providing for the effective combustion of all smoke and gases orother freed products, consequently eecting a saving of fuell andincreasing the heating' action of the furnace.

Said invention consists of detailed structural features substantially ashereinafter more fully disclosed, and particularly pointed out by theclaim.

In the accompanying drawings, illustrating the preferred embodiment ofmy invention, Figure 1 is a broken perspective view thereof. duced inthe plane of the lower superheated steam and air conduits or passages ofone half of the furnace and a like section produced in the plane of theupper superheated steam and air conduits or passages of the other halfof said furnace. F ig. 3 is a view of a halfor one section of one of thebricks used in constructing said conduits or passages. Fig. 4 is a viewshowing such a brickv with the sections or halves thereof assembled.

In the carrying out of my invention I construct the furnace 1 generallyin the ordinary way, providing, however, the combustion-chamber 2 withlateral and rear wall conduits or passages 3 and 4, respectively, of

the character or construction as hereinafter disclosed for feeding ordelivering, as above noted, superheated steam or air, or both, into saidchamber to aid or promote combustion. Each conduit or passage, whoseinlet end or intake 3a is preferably at the front end of the furnace,traverses one side of the combustion-chamber and about one-half of therear wall, where it extends upward, as at 3b, and returning parallelwith itself terminates a short distance from the forward end of thefurnace and opens through said lateral wall of the combustion-chamber,as at 3C, for the discharge or delivering of the super- Fig. 2 is ahorizontal section pro-` heated steam and air into said chamber. It isnoted that the purpose of returning said conduit and terminating thedischarge end thereof in a plane higher than its other portion andintake end is to provide for a more satisfactory circulation or passagetherethrough than would otherwise be the case of the air and itseffective delivery upon the fire-bed. Said conduits are constituted orconstructed of fire bricks or blocks 3X, each being produced in halvesand hollow, with the halves brought together to form the conduits, saidblocks or bricks being of the usual or angular exterior or outline, asshown, to form the inner surfaces of the lateral and rear Walls of thecombustion-chamber.

Steam-delivery pipes 4, one for each conduit or passage and connectedwith a boiler or steamgenerator, have their discharge ends entering theintake ends of said conduits and extending a'suitable distance withinthe same for suitably feeding or supplying steam thereto, which will byits passage therethrough be superheated and be thus discharged, togetherwith air simultaneously entering and sucked into said conduits, into thecombustionchamber upon the fire-bed or products of combustion, therebyproviding for effecting the combustion of the gases, smoke, and otherfreed products, thus increasing the heating action of the furnace andeconomizing fuel. The aforesaid arrangement of conduits or passageseHects more than would otherwise be the case increased feeding action ofthe superheated steam and air, thus securing a more thorough combustionof the products freed from the fuel in combustion. Also by providing forthe continuous feeding to the fire-bed of said steam and air and thereturn passages thereof during such feeding action, subjecting the steamand air to a reheating action, the latter are delivered in their mosteective form upon the fire-bed.

Itwill be noted that this invention embraces improvements in furnaceswhich are especially applicable for use in connection with boilers, asis obvious and as will bev fully appreciated from the foregoing.

It is understood that latitude is allowed as to details herein, as theymayv be changed as circumstances suggest Without departing from thespirit of my invention and the latter still be protected.

I claim- Afurnace of the character described, whose IOS IIO

combustionchamber has its walls comprising courses of bricks, eachformed in hollow joined-together sections forming conduits or passagesJmeans for feeding the air and superheated steam into said conduits,landsaid conduits delivering into the combustionchamber, and each of thethus formed conduits having its intake end at the frontor one end of thecombustionh chamber and itself traversing one sidev and about onehalfthe rear wall thereof and extending upward in

